Gauge

Read and analyze each question then choose and write the

letter of the correct answer in a separate sheet of paper.

_____1. Which is true about electromagnet?

A. They are permanent.

B. They do not need a battery.

C. Increasing the battery makes the electromagnet weaker

D. Increasing the number of coils make the electromagnet stronger


_____2. Which object is NOT use in making an electromagnet?

A. core

B. dry cell C. magnet D. wire


_____3. Which of the following can make an electromagnet stronger?

A. Adding more dry cells

B. Using bigger nails

C. Increasing the number of turns in the coils of wire D. All the
above


_____4. Joshua wants to construct an electromagnet. He has a long piece of

wire, two dry cells. What else does he need?

A. Iron nail

B. glass tube

C. plastic tube

D. plastic screw

_____5. What happens when you use lesser voltage dry cell in your

electromagnet?

A. The electromagnet loses its magnetism.

B. Electromagnet becomes weaker.

C. The electromagnet becomes permanent magnet.

D. There is an increase in the number of materials attracted.


_____6. Dan wants to increase the strength of an electromagnet. What

should he do?

A. Decrease the size of iron core

B. Increase the turn of wire

C. Remove the iron core

D. Stop the flow of electricity


_____7. Why is the wire used in electromagnet coiled?

A. It has more force.

B. It controls the field of attraction.

C. It controls the flow of electricity.

D. It controls the flow of electrons.


_____8. How can we strengthen an electromagnet?

A. Decrease the voltage

B. Use small iron core

C. Increase the number of turns in the coil

D. Put a magnetic substance in the coil



_____9. Which can increase the strength of an electromagnet?

A. Increasing the number of dry cells and coils of wire around the

nail

B. Decreasing the number of dry cells and coils of wire around the

nail

C. Decreasing the coils of wire around the nail

D. Using small size dry cell



_____10. The following statements on making electromagnets stronger are

true except one. Which is NOT?
A. The greater the number of dry cells, the stronger the

electromagnet is.

B. The smaller the size of the dry dell, the stronger the

electromagnet is.

C. The greater the size of the iron core, the stronger the

electromagnet is.

D. The more turns of wire, the stronger the electromagnet is. ​